The next time the cops chase you down for speeding, they could be driving a fuel-efficient hybrid.

Ford, which sells more police vehicles in the U.S. than any other automaker, says it will offer a police pursuit version of the Fusion hybrid, in response to requests from cities nationwide. The new car, with its four-cylinder engine and 1.4 kWh lithium-ion battery, is expected to get 38 mpg in combined city-highway driving – 20 more than Ford’s current Taurus-based interceptor.

The hybrids won’t be as fast as the Taurus with 3.7-litre twin-turbocharged V6, but Ford expects the Fusion to be quick enough to earn a pursuit rating when tested later this year by the Michigan State Police and Los Angeles County Sheriff’s Department; it will be the first hybrid to earn that honour. To get a pursuit rating, cars have to perform well in acceleration, handling, braking, top speed and ergonomics, and make the list of cars that the Michigan and Los Angeles agencies would buy.

When the throttle is held down for five seconds, the car will go into pursuit mode, using both the electric motor and the gas engine for maximum performance, Ford said. The company also says the car will be durable for tough police duties.

Police cars spend much of their days idling by the side of a road, and that’s where the hybrid has a true advantage, Ford said. The gas engine will shut off at idle, with the battery handling the electrical load for flashers, radios and other items. It will restart to recharge the battery.

Ford said at US$2.50 per gallon for gas, the hybrid would save a police department US$3,877 per year in fuel costs per vehicle. The price of the hybrid, available in the summer of 2018, isn’t being released just yet.

While big-city departments might be most interested in the fuel savings, the cars might also be appealing to small departments. Thomas Korabik, chief of the 10-officer North Muskegon Police Department in Michigan, said his city spends about US$22,000 per year on gasoline for four cruisers and would be interested in cutting that in half.

But he wonders if the Fusion is big enough inside to carry computers, radios and other equipment. Many departments have switched to SUVs to handle the equipment, said Korabik, who also is president of the Michigan Association of Chiefs of Police.

“Any time you can save money, it is good,” he said. “I’d want to see the car first and see how it would hold up.”

Todd Soderquist, Ford’s chief engineer for the Fusion Police Responder, conceded the car is smaller than other cruisers on the outside.

“Internally, you’ll be surprised at how comparable they are,” he said.